Coolant supply for milling machines



Dec. 10, 1929. B. P. GRAVES 1,738,646

COOLANT SUPPLY FOR MILLING MACHINES Filed March 30, 1926 3 Sheets-Sheet l ,a yamzz? ammg Dec. 10, 1929,

B. P. GRAVES COOLANT SUPPLY FOR MILLING MACHINES Filed March 30, 1926 3 Sheets-Sheet 2 WW HiEMEF v ml lll l F Dec. 10, 1929. B. P. GRAVES COOLANT SUPPLY FOR MILLING MACHINES Fi led March so. 1926 3 Sheets-Sheet 3 Patented Dec. 10, 1923 UNITED sr 'r-Es [PATENT- orsice;

BENJAMIN P. GRAvEsjor. cnANscroN, ,RHODE IsLAND, As'sIenoItrlro BRO N AND SHARPE MANUFACTURINGVCOMPANY, F PROVIDENCE, RHODE IsLAND, A con- PORATION 0F RHODE ISLAND COOLANT SUPPLY FOR MILLING MACHINES Appl i cation fll ed March 30, 1926- Serial No. 98,500.

My invention relates to cutting machines I and specifically comprises the provision f means to supply a coolant to the respective cutting edge of a rotary cutting means on a reciprocatingpiece of work while said outting means and work are in relative cutting relation only and for shutting off the supply of coolant when they are not at other desired portions of the reciprocating cycle of said work;

My invention is specifically adapted for use i on the type of milling machine which emcutting operation in machines of this dey .scription, asshown in my specific embodiment, except during the cutting stroke of areciprooating work support. So far. as my inf vention is concerned, it includes various comploys a rotary cutter and has the work mounted on a reciprocating work support adapted to advance the work up to said cutting means and past said cutting means in cutting relation thereto and on reversal to return said work toits original position. In machines of this description thecoolant is 7 normally discharged at an angle against the cut of the rotary cutting means onthe work and it is only during a small portion of the reciprocating cycle that the work is in contact with the rotary cutting means; The

main object of my invention, therefore, is to completely shut off the supply of coolant at all times when it is not actually needed in the mon types ofmilling machines. For instance,

the type where only one pieceof work isreciprocated and the cutter normally revolves to cut in one direction and where the coolant is normally supplied from one side only.

also be employed on the type of milling machines capable of doing intermittent 'millv ing as described in said patent. Moreover, my invention is peculiarly adapted, as. shown in the preferred embodiment, :for-

use in a milling machine capable of doing continuous milling, as described in said patnot being. cut. 4

.of milling, either a single cutter may be emma-e4 cut, that is, where apiece of work is milled during the travel of the support in each direction and the operator removes-a'finished piece from each end of the support and replaces it with another while a piece of work at the, other end of the support is being milled."

Where-a piece of workis milled. on each stroke of the support, it is. obvious that it is then necessary to supply a coolant discharg- 7 mg means to discharge the coolant on the side,

of the rotary cutting means against the work, thus as shown in my preferred embodiment on each side of saidrotary cutting means and to alternately shut ofi the supply ofc-oolant to each respective piece of work while it is, It is obvious thatin this type ployed for the oppositely disposed pieces of work or an individual cutter for each pieceof .work.

As a result of shutting off the supply of coolant except when it is actually needed during the cutting operation, it is obvious that I have not only saved a large amount. .of coolant, but that I also have made working conditions free from an unnecessary amount of lubricant,cleaner and much more pleasant for the operator. v

These'and such other objects of my invention as may hereinafter appear will be best understood from a description of various em bodiments thereof such as are shown in the accompanying drawings. r

In the drawings, Fig. l is a diagrammatic plan V ieWof a milling machine adapted for continuous milling, employing a single cut vter with my invention attached.

v Fig. 2 is a diagrammatic plan'view of a mllling machine also adapted for continu- Fig. tis a rear view of a portion of the rear of the -milling=machine, showing in detail the two -way valve I employ for reversing the flow, of coolant to the respective coolant discharging means with thecover plate thereof .removed. 1

ous milling, but employing an individual two-way valve and the automatic act ating Fig. 5 is a side elevation of a portion of the rear end of a milling machine also illustrating the two-Way valve and the actuating mechanism therefor which I preferably emloylf a Fig. 6 is a diagrammaticsideelevation of a milling machineillustrating not only the mechanism thereof automatically .actua e aby the movement of the support, but also the 'manually controlled means I preferably en1 ploy to independently control the coolant supply.

Fig. '1 is a detailed view:- the link 1 pref jb y p oy fo det q ably c nn cting t n al y c ntr mee 'sf to 'qntfrolQth nt f, h Suppo t a d mew-way valve. actuating means. i

In the drawings, wherein like" characters 16f ref r n n i ate li r n s .th ie e es v. 0 g ne y indi ates e ment W llie machine of. a ty' ehaving the travelling vvor support or tabe 12 adapted to reeipifoeate thereon. As stated; for detailsoi: construeftion of the articular machine shown, refer- 355,1 7

sl is! h y ma e oi'l e j t Nb? 1 r n e O er 2', 192 t t er- A Ri ai w upport' l2 i' 'edapte i t9 liav 'th Work mp d n pr f rably a acent to n e t ot' ndl' aiklmeeh i eI d p ed t be sediofr s nfiieu li Illing w bri e' r c es o 'WQrk 7 an 14; ar

' clamped 'to said supporton' 'opposite ends thereof. The support '12 is reciprocatfed by v the, usual mechanism and gearing 1 6 in the usual fashion as fully described in Patent Nol 1,355,167. Saidreciprocating mechanism 16 is controlled as usual either by means of the hand lever 18. or automatically by means of the dogs 20 on the front edgeot said reciprocating work support 12," The'milling 'machine may also be provided with the fast and slow speed control mechanismf fll either v automatically controlled throught'he medium of thefdon is 24 or manually throjigh 'the mediuin ofthe hand lever 26*as shown in said patent. said machine; is" also provided With the rotary s 'iindle 30adapted to be revolved ,7 if desired alternately eitherfdireetion; by

the'mechanism 32'exp'l'ained inifdetail in said patent. Said rotary spindl'e'is provided the rotary cutting Ineans34fl vhih maypomprise either thesingle' cutterf 3,4:shovyfn' in Fig 1 or the plurality Dreamers 3& and 34 shown in Fig. '2, one for ea ch respective piece It is obvious that said jmiuirig mac ine 6 erateseither throughthe mediuin of thehand contllQl or the automatic, control 'relferr'edto,

to advance the Work, 14 up to respective" cutt ng means 34 and'pas'tsaid cutting means i 4.341 in aimin relation thereto andto'aut'omati- 1 Cally or manually reverse and return the ivork to1ts' original 15081131011, 'and that in i Te-sp'ecific embodlment "of milling machine 's'hovvn the movement of the Work support 12 in one 7 dirction functions as a cutting stroke for the 'WOIk 14 and a reverse stroke for the Work 14 whereas the movement of the tablein the opposite direction functions as a cutting stroke for the Worklt" and as a reverse stroke for the Work 14:. e r v As-Statedt. r i ventiqnt p c fic ly r l te to: heme ns ta upplr a. coolant th t g ge vi a-id reuttinghmeen a e the Work 14 during the cutting operation only andtoishutitiofi at other times, thus "preferr'e embodiment; a plurality-of means;

mounted on each side of said cuttmg means 34,*t'o discharge the coolant 7 desired "cutting edge of said cutting means 34 against the Work. 'In my preferred n oizleskl fiand .42 of a width approximately embodiment, said means 42 comprise the flat fequ'a hto thtrtQOf'the cutter-34, preferably; fangula'rly disposedrelative to the cutting 'edg'eFofshid cutting means 34: to discharge a coolantinfa fiatfsh'e'et against the respective cutting edge ofsaid means against the WOI'k. also'provide'ineans connecting said coolant ,suppilyline, 40 with each respectivecoolant disc twp-Way valve 50, suitably connected "by arging'means i2iand' 42".; I In; my pre-V I Pferr'edf embodiment, said means includes the' ineansof the orifice 52 to the coolant supply line 40 and having the discharge ports 54? and 54 each adapted to be 'connectedrespec 1 tivel'y to the respective] coolant "discharging means a ena '42 the ,respective Y, pipes 56 and 56"- "The 'e'oolantsu'pply' line 40 may be provided with a manually operative shu'ttejf' oolant1thrpagtsaidiI-ine 40;; 11

I 'projv ide means controlled by the i move; mer t of said work; support12'tUactuate said two -vyayj v alvefifl toalterrrately connect the roperesonate discharging mans 42* and 42? withfjsaid' coolantsu ply ling 4 ;t 41; ply the coolant'm thp t en 'relative" cutting edge of said cutting means-34 against is relfcjur'e the} shaft 60 transversely of saidfmachine inl-suitable-bearingsin said" valve '50' spea s-racerefwe l tr fla e 'c utti-ng operation. To 'aocomplish' thisin 4 my preferred mbodiment, t' -pivdtally 1 sc -12 and inithe -frame;10"of said machine,-saidj shaft preferably terminating within 1 the valveyso "andhavin its oppositeendterminating-on 'the front of thefmachine: T0 at 1 t ernetely'iclfo se the po -ate apd'sa of said vjalyIe I' provide th 10surearm 62, suitably pi-v'ot;d to sai -sh re GO Wi-thinthe chamber *69. oi- 'said val-$50. Ibis-thus obvioiisithaof said closure arm 62 on respective pivoting movement thereof is adapted to alternately open and close the respective coolant discharging means connecting orifices 5& and 54 of said two-Way valve 50. I secure to said shaft 60 at a point adjacent to the rear edge of the travelling work support 12 the operating lever 64;, the upper end thereof extending adjacent to the rear edge of said travelling work support. To automatically actuate said operating lever, I provide the rearwardly projecting dogs 66 horizontally adjustable on the rear edge 68 of said work support 12. It is thus obvious that as said dogs 66 contact said operating lever 64 that they will pivot said operating lever 64 to pivot said shaft 60 to swing said closure arm 62 from closure of the orifice 54 to closure of the orifice 54; and vice versa as contacted by the dogs 66 in the reciprocating cycle of said support 12 to alternately connect the proper coolant discharging means 42 or 42* with said coolant supply line to supply coolant from the then relative cutting edge of said cutting means 42 against the Work during the cutting operation of said cutting means on its respective piece of work 14? or 14*. It is obvious that as the dogs 66 are horizontally adjustable on the rear edge 68 of said reciprocating work support 12, that they may be adjusted to move the closure arm 62 from covering up the orifice 54: or the orifice 54 at any desired periods of the reciprocating cycle of the support 12. In case it may be desired to employ the apparatus hitherto explained for automatic milling or intermittentmilling on a single piece of work or otherwise, either the orifice 54 or the orifice 54 may be suitably plugged to completely shut ofi the supply of coolant during the entire portion or part of either the cutting or reverse strokes of said support 12 or a valve may be inserted in said lines 56 or 56 for this purpose.

As stated, the type of'machine shown-in my preferred embodiments is also preferably provided with the manually controlled means 18 to independently control the movement of the table. In my preferred embodiment, to provide means controlled by said manually controlled means to independently control the supply of coolant, I provide the link 70 pivotally attached to the front end 74 of said shaft 60 and adapted to be detachably secured to said means 18 by means ofthe hook mechanism 72. It is thus obvious that if it is desired to manually control the supply ofcoolend of the link 70 to said operating handle 18.

ant in conjunction with the manual control and movement of said support 12, that it is merely necessary to detachably secure the In my preferred embodiment to cushion the shock of pivoting movement of the closure 1 arm 62, I preferably providethe cushioning devices 63 mounted in each side wall of said two-way valve 50. I provide the cylinders 65 in each opposite side wall of said valve 50 having the openings 67 of smaller diameter extending into the valve chamber 69. I also provide the plungers 71 having the stems 73 thereof projecting'into said chamber 69 throu hsmd o enm s 67 and the heads 7 5 resting on sprin s 76 secured within said a? cynnders 65. It is thus obvious that as said plungers 73 are alternately struck by the Cl0- 17 sure arm 62, which is moved as explained,

by the dogs 66 contacting the operating lever 6-l,that said plungers 71 are depressed in the cylinders 65 against the pressure of the springs 'Z 6 to permit the dogs 66 to pass by a the operating lever 64:. It is obvious, how-- ever, that when the pressure on the operating lever 64: is released that the springs 76 will immediately function to raise up said plungers 71 to raise up said closure arm 62 to raise;

of a cutting machine wherein it isdesiredc to supply the coolant against the work."

ft is obvious that employing my invention,

agreat saving is made in coolant used, that the operating conditions are made much more attractive to the'workman and that the entire niachine is cleaner than hitherto.

It is obvious that in place'of'one piece of work, or one piece of'work on each end of the support, a plurality of pieces of work'may be so mounted and I therefore in the claims 0:

the operatin lever 64 in the path of their;

limited to the specific embodiments shown a or methods described and that various deviations may be made therefrom 'wlthout departing fromhthe spirit and scope of theap-i pended claims.

What I clalm'as new and desire to secure 'byLetters Patent is:

1. In a machine, in combination, rotary cutting means mounted'ther'eon, a reciprocating work support mounted thereon adapted to hold pieces ofwork on opposite ends thereof and to advance them alternately intooperative cutting relation to said cutting means,

means to change the direction of travelof said support, a plurality of means, to supply a "coolant to the cutting edge of said means against the work and means controlled by the "movement of, the support to alternately'sup-' ply said co'olant to the desired'relative cutside as desired. 1

ting side'of said cutting means and to shut off the supply of coolant from the opposite 2. In a machine, in combination, rotary cutting means mounted thereon, a reciprocating work support mounted thereon adapted to hold pieces of work onopposite ends thereof andto advance them alternately into operative cuttingrelation to said cutting means, means to change the dlrection of travel of said support, a plurality of means on opposite sides of said cutting means to supply a coolant to the cutting edge of said means 1 against the work and means controlled by the movement of the support to supply coolant alternatelly at opposite sides'of said cutting means at desiredpredetermined portions of the reciprocating cycle.

3. In a machine, in combination, rotary cutting means mounted thereon, a reciprocating work support mounted thereon adapted -;to hold pieces-of work'on opposite ends thereof and to advance them alternately into operative; cutting relation to said cutting means, means to automatically change the direction of travel of said support, a plurality ofmeans to supply a coolant to the cutting-edge of said means against the work and means controlled by the movement of the support to automatically alternately supply said coolant to the desired relative cutting side of said cutting means and to auto- 'matica-lly shut oil the supply of coolant from the opposite side as desired.

4;. In a machine, in combination, rotary cutting means mountedthereon, a reciprocating work support mounted thereon adapted to hold pieces of work on opposite ends thereof and to advance them alternately into operative cutting'relation tosaid' cutting means, means to automatically change the direction of travelof said support, a plurality of means on opposite sides of said cutting means to supply a coolant to the cutting edge of said means against the 7 work and means controlled by-the movement of the support to automatically supply coolant alternately atopposite sides of said cuttingmeans at desired; predetermined portions of the reciprocating cycle;

, 5. In afmach1ne, in combinationfrotary cutting 'meansmounted thereon, a reciprocatto hold pieces of 7 work on oppositeiends thereof and to advance them alternately into operative cutting relation to said cutting 'means, means to automatically change the h I direc tion of travel of said support, a plural it of means to supply a coolant to the cut- :ting'edge of said means against the Work and 7 means controlled by. the movement ofthe sup port to alternately automatically supply said coolant to the desired relative cutting side j V V of said cutting means and to automatically shi O h supply of co ant r m th 9P- lng work support mounted t-hereon adapted 7 posite side as desired, manually controlled means to independently control the movement of said support and means controlled by said means to. independently control the supply of coolant.

6. In a machine, in combination, rotary cutting means-'mounted thereon, a reciprocating work support mounted thereon adapted to hold pieces or" work on opposite ends thereof and to advance them alternately 1nto operativecutting relation to said cutting means, 7

means to automatically change the direction of travel of said support, a plurality ofmeans on opposite sides of said cutting means'to supply a coolant to the cutting edge ofsaid means against the work and means controlled cutting means mounted thereon, a reciprocat-' mg work support mounted thereon adapted to hold pieces of work on opposite ends thereof and to advance 'thepiece on each respective end thereof alternately into operative cutting relation to said cutting means, means to change the direction of travel of said support, a plurality of'means to-dis charge a coolant to the cutting edge of said 1 means against the work, a coolant supply reservoir, means connecting said'supply reservow to each respectlye coolant-discharging means ncluding a two-way valve and means controlled by the movement of said support to actuate said two-way valve to alternately connect the proper'coolant discharging means with said reservoir to, supply coolant to the desired cutting edge of said cutting. means against the work during the cutting operation.

8, In a machine, in combinatiomrotarycutting means mounted thereon, a reclprocating work support mounted thereon adapted to hold pieces of Work on opposite endsthereof and to advance the lpiece of work on each respective end thereof, alternately into operative cutting relation to. said cutting means,

means to automatically change the direction of travel ofjsaid support, a plurality of means to dischargea coolant on the cutting edge of V i said means against the work, a coolant supply reservoir, means connecting said supplyf reservoir to eachlrespective coolant discharging means including a two-wayvalve, means controlled byjthe movement of said support to actuate said two-way valvealternately to, automatically connect. the proper coolant dis charging means with said reservoir :to sup-.. ply coolant to the desired cutting'edge of said cutting means against the work' duringthe cuttingoperation, manually.controlledmeans V to independently control the movement of the support and means detachably secured to said means to independently control the supply of coolant against the Work.

9. In a machine, in combination, a rotary spindle, a plurality of cutting means mounted thereon, a reciprocating Work support mounted thereon adapted to hold pieces of work on opposite ends thereof and to advance them alternately into operative cutting relation to said cutting means, means to automatically change the directionoftravel of said support, a plurality of means to supply a coolant to the cutting edge of said respective cutting means against the Work and means controlled by the movement of the support alternately to automatically supply said coolant to the desired cutting side of said respective cutting means and to automatically shut off the supply of coolant from the opposite side as desired, manually controlled means to independently control the movement of said support and means controlled by said means to independently control the supply of coolant to said respective cutting means.

10. In a machine, in combination, rotary cutting means mounted thereon, a reciprocating Work support mounted thereon adapted to hold pieces of Work on opposite ends thereof and to advance the piece on each respective end thereof alternately into operative cutting relation to said cutting means, means to change the direction of travel of said support, a plurality of means to discharge a coolant on the cutting edge of said cutting means against the Work, a coolant supply reservoir, means connecting said supply reservoir to each respective coolant discharging means including a two-Way valve, a pivoted closure arm adapted to alternately close the respective coolant discharging means connecting orifices of the two-Way valve and means controlled by the movement of said support to actuate said pivoted closure arm to alternately connect the proper coolant discharging means with said reservoir to supply coolant to the desired cutting edge of said cutting means against the Work during the cutting operation.

11. In a machine, in combination, rotary cutting means mounted thereon, a reciproeating Work support mounted thereon adapted to hold pieces of Work on opposite ends thereof and to advance the piece on each respective end thereof alternately into operative cutting relation to said cutting means, means to automatically change the direction of travel of said support, a plurality of means to discharge a coolant on the cutting edge of said cutting means against the Work, a coolant supply reservoir, means connecting said supply reservoir to each respective coolant discharging means including a two-Way valve, a shaft pivoted adjacent to said valve and the rear edge of said travelling Work supcharging means With saidreservoir to supply coolant from ther'elative cutting edge of said cutting means against the Work during the cutting operation, and means to raise up said operating lever afterjdepression thereof by said dogs. to the path of said dogs so as to be contacted by the proper dog during the next movement of the support. s

'12. In amachine, in combination, rotary cutting means mounted thereon, a reciprocating vvork supportmounted thereon adapted'to 'holdjpieces' of work on opposite ends thereof and to advance the piece on each respective end there'ofalternately into operative cutting relation to said cuttingmeans,

means to automatically change the direction of travel of said support, a plurality of means j to discharge a coolantto the cutting edge of said cutting means against the Work, a cool ant supply re servoir, means connecting said supply reservoir; to each respective coolant discharging means including a tvvo-vvay valve, a shaft pivoted adjacent to said'valve and the rear edge of said travelling Work support, a closure arm secured to said shaft adaptedt'to alternately close the respective coolant discharging means connecting orifices of the two-Way valve, an operating lever secured to said shaft and extending adjacent to the rear edge of said travelling Work support and horizontally adjustable dogs projecting from the rear edge of said travelling Work support adapted to contact said operating lever to actuate said closure arm to alternately connect the proper coolant discharging means With said reservoir to supply coolant to the desired cutting edge of said cutting means against the Work, during'the cutting operation, manually controlled means to independently control the movement of the support and a link detachably connecting said means and said shaft to, conj ointly with movement of said means, pivot said shaft to independently actuate said closure arm to independently connect the respective coolant discharging means with said reservoir to control the coolant supply.

13. In a machine, in combination, rotary cutting means mounted thereon, a reciprocating Work support mounted thereon adapted to hold pieces of Work on opposite ends thereof and to advance the piece on each respective end thereof alternately into operative cutting relation to said cutting means. means to e a iaaa automatically change the direction of pra el of said support, a plurality of means to s charge a coolant to the cutting edge of said cutting means: against the wo k, a coolant supply reservoir, means connecting said supplyreservoir to each respective coolant discharging means including a two-wa valve, shaft pivoted adjacent to said valve and the rear edge 'of said travelling work'suppon, a

closure arm secured to said shaft adaptedto alternately close the respectivecoolant dis:

charging means connecting orifices' ofi the two-way valve, an operating leverv secured to saidshaft and extendingadjace'ntito the level to c a said closure am v 7 and horizontally adjustable dogs roj'ect'ing from the rear edge of said tra've w'oi' f rear edge of said travelling work support adapted to contact said 0%)e'iatin'g t alte'rnately connect the proper coolant discharging means with said reservoir tojsu' ply eoalant to the desired cutting edgeof saidci'ltting' means against the work during the utting operation and means tofraise 11p said peraing lever after depression'thereof bysaid dogs to the path of said dogs so as to be contacted by the proper dog during the ne xf t movement of the sup ort, ma ually conv trolled means to independently Control the movement of the support and anal: detachably connecting said meansand said shaft to, conjointly with movement of said means, pivot said shaft to independently actuate said closure arm to independently connect the respective coolant discharging means 'vvith said reservoir .to control the coolant supply.

In testimony whereof I aifi'x signature.

' BENJAMIN P; GRAVES. 

